Siphon and outlet or weir chamber for flush-tanks



(No Model.)

G. E. WARING, Jr.

SIPHON AND OUTLET 0R WEIR CHAMBER FOR FLUSH'TANKS.

No. 336,182. Patented Feb. 16, 1886. Z F? v 8a- J f5? A N. PETERS. Phncv-Lilha n har. Wnshinglm. D. C.

UNITED STATES PATENT OFFIcE.

GEORGE E. WARING, JR, OF NEWPORT, RHODE ISLAND, ASSIGNOR TO THE DRAINAGE CONSTRUCTION COMPANY, OF BOSTON, MASSACHUSETTS.

SIPHON AND OUTLET OR WEIR CHAMBER FOR FLUSH-TANKS.

GPECIFICATION forming part of Letters Patent No. 336,182, dated February 16, 1886.

Application filed February 10, 1885. Serial No. 155,553.

To all whom it may concern.-

Be it known that I, GEORGE E. WARING, Jr., of the city of Newport, county of Newport, State of Rhode island, have invented a new and useful Improvement in Siphons and Outlet or Veir Chambers for Flush-Tanks; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming partof this specification.

My invention relates to an improvement in the construction of siphons for the discharge of flush-tanks, and in the outlet or weir chambers, by which the intermittentact-ion of such siphons is secured.

As constructed prior to my invention, the discharging-limb of the annular siphon had substantially the same diameter throughout its whole length. The ajutage or cone used at the upper end of the same was made only slightly smaller than the interior diameter of the discharging limb, in order that water might fall close to the lower end of the pipe, and so enable a good proportion of the bubbles of air carried down by its fall to escape outside ofits outlet, and thus, little by little, withdraw the air from the discharging-limb of the siphon, which is sealed at its upper end by the contents of the tank, and at its lower end by the contents of the outlet-chamber. It was found in practice that some waters have the effect of producing blisters of rust on the inside of the pipe, so that after a time the water which should have fallen tree from the edge of the ajutage tothe waterin the outletchamber was caught by the projecting rustblisters and led down to the outlet-chamber without producing the desired effect of removing air.

Outlet or weir chambers, as constructed prior to my invention, were supplied with a circular subsidiary siphon leading over the overflow-point, for the purpose of continuing the flow from the chamber after the discharge of the tank had ceased, thus carrying its water so low as to secure the unsealing of the outlet of the siphon. It was found in practice that such circular subsidiary siphons, if small enough to operate satisfactorily, were very likely to become obstructed by foreign objects contained in the water with which the tank is (No model.) Patented in France September 3, 1893, N0.147.675.

filled. To obviate this difficulty, the subsidiary siphon was made by carrying a horizontal diaphragm lengthwise over the overflowpoint, giving a space of segmental form considerably larger than the circular siphon. The operation of siphons in this new form, though sometimes satisfactory, was not always so. As the time when the need for its action approached, the How from the tank through the main siphon was very much reduced by the lowering of the head. so that the subsidiary siphon, being of large capacity, would take air at its outer end and cease its siphonic ac tion before it had accomplished its purpose.

The above defects are remedied by the means herein set forth, where the d ischarginglimb of the siphon is made throughout nearly its whole length considerably larger than its outlet, where the wall is carried back so far from the line between the edges of the ajutage and ot' the mouth of the siphon that rust cannot build out far enough to interfere with the falling of the water, and where the mouth of the subsidiary siphon at M is obstructed by a dam, N, set a little way in front of it and slightly lower than its upper part.

In the drawings, Figure 1 represents avertical section through the flush-tank F F, the siphon, and outlet or weir chamber. Fig. 2 represents a cross-section through the siphon at a a. Fig.8 represents a cross-section through the outlet end of the weir-chamber and through its subsidiary siphonon the linebb. Fig. 4 isa crosssection through the highest part of the weir-chamber and through its subsidiary siphon on the line 0 0.

Like letters indicate like parts in the differcnt drawings.

A is the discharging-limb of the siphon.

B is the outlet or weir chamber.

C is the movable coverof the weir-chamber.

D is a flange by which the pipe Ais attached to the fixed part of the top of the chamber B.

E is the diaphragm converting the outletchamber into a subsidiary siphon, 0.

M is the mouth of thesubsidiary siphon, and N is a dam placed in front of it, partially to obstruct its flow.

J is the ajutage or cone at the top of the discharging-limb of the siphon.

K is the outlet of this limb.

The operation of the apparatus as improved is as follows: The tank being filled to the top of the discharging-limb of the siphon, the water overflows and is carried by the ajutage or cone J and falls into the chamber beneath, passing near to but not quite touching the edges of the outlet K. The operation of the subsidiary siphon 0 at the previous discharge has lowered the water in the chamber to the line 19. The water falling through the siphon gradually raises this water to theline g, which is the height of the highest point of the chamber, (its overflow-point,) and which is so adjusted asjust to seal the mouth of the discharg- 1ng-limb of the siphon. As water continues to fall, it carries bubbles of air into the water of the chamber, and some of these escape outside ofthe outletK,reducingby so much the amount of air in the pipe A. This removal of a portion of the air lessens itstension,and the pressare of the atmosphere on the water in the tank increases the flow. In like proportion the increased flow increases the rapidity with which the alr is removed until the stream becomes strong enough to sweep all air out of the pipe A, when the tank is rapidly discharged by a complete siphonic action. During this discharge the outflow from the chamber takes place through the whole section, as shown in Fig. 2, through the subsidiary siphon 0,as Well as through the main part of the chamber B. When the tank is nearly discharged and the flow becomes sluggish, the subsidiary siphon would empty the chamber and take air at one end or the other, and cease its action before the entire cessation of the discharge from the tank. The result would be that the waterlevel in the chamber would rise again to the line q, and prevent the unsealing of the main siphon. By placing the dam N in front of the subsidiary siphon, but a little below the top from the tank has entirely ceased, nor until the water in the chamber has been reduced to the line 1;. The water in the chamber asit.

falls from the line q to the linep admits air-to the mouth of the siphon K, and so cans'es'it to become entirely emptied, which is a necessary condition, as otherwise the water in the tank would rise but a few inches before starting a fresh flow through the siphon,and the complete filling of the tank would be prevented. The placing of the dam N below the top of the outlet vof the subsidiary siphon is a necessary condition of successful working. Were it not placed low enough to admit air after the-lowering of the water in the chamber to the line p, it would remain full, or nearly full, of water, and the water flowing through the siphon at the beginning of theoverfiow would be withdrawn through the subsidiary siphon, instead of remaining to fill the chamber .to the line .g and seal the outlet K, as required.

Having thusdesc'ribed my invent-ion, {claim as new and desire to secure by Letters Patent 1. A siphon for discharging flush tanks, &c., of which the-discharging-limb is provided with a funnel at the top, and the bottom of 

